package com.walker.util;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
 
/**
 * 前后端数据传输加密工具类
 * @author monkey
 *
 */
@Component
public class AesEncryptUtils {
	
    //可配置到Constant中，并读取配置文件注入,16位,自己定义
    private static String KEY = "act-telecom.com1";
  
	//参数分别代表 算法名称/加密模式/数据填充方式
    private static String ALGORITHMSTR = "AES/ECB/PKCS5Padding";
    

	public static String getKEY() {
		return KEY;
	}

	@Value("${params.aes.key}")
	public static void setKEY(String kEY) {
		AesEncryptUtils.KEY = kEY;
	}

	public static String getALGORITHMSTR() {
		return ALGORITHMSTR;
	}

	@Value("${params.aes.algorithmstr}")
	public static void setALGORITHMSTR(String aLGORITHMSTR) {
		AesEncryptUtils.ALGORITHMSTR = aLGORITHMSTR;
	}
 
    /**
     * 加密
     * @param content 加密的字符串
     * @param encryptKey key值
     * @return
     * @throws Exception
     */
    public static String encrypt(String content, String encryptKey) throws Exception {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"));
        byte[] b = cipher.doFinal(content.getBytes("utf-8"));
        // 采用base64算法进行转码,避免出现中文乱码
        return Base64.encodeBase64String(b);
    }
    
    public static String encrypt(String content, String encryptKey,String ALGORITHMSTR) throws Exception {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"));
        byte[] b = cipher.doFinal(content.getBytes("utf-8"));
        // 采用base64算法进行转码,避免出现中文乱码
        return Base64.encodeBase64String(b);
 
    }
    
    /**
     * 解密
     * @param encryptStr 解密的字符串
     * @param decryptKey 解密的key值
     * @return
     * @throws Exception
     */
    public static String decrypt(String encryptStr, String decryptKey) throws Exception {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"));
        // 采用base64算法进行转码,避免出现中文乱码
        byte[] encryptBytes = Base64.decodeBase64(encryptStr);
        byte[] decryptBytes = cipher.doFinal(encryptBytes);
        return new String(decryptBytes);
    }
    
    public static String decrypt(String encryptStr, String decryptKey,String ALGORITHMSTR) throws Exception {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"));
        // 采用base64算法进行转码,避免出现中文乱码
        byte[] encryptBytes = Base64.decodeBase64(encryptStr);
        byte[] decryptBytes = cipher.doFinal(encryptBytes);
        return new String(decryptBytes);
    }
    
 
    public static String encrypt(String content) throws Exception {
        return encrypt(content, KEY);
    }
    
    public static String decrypt(String encryptStr) throws Exception {
        return decrypt(encryptStr, KEY);
    }
 
    public static void main(String[] args) throws Exception {
    /*    Map map=new HashMap<String,String>();
        map.put("key","value");
        map.put("中文","汉字");
        String content = JSONObject.toJSONString(map);
        System.out.println("加密前：" + content);
 
        String encrypt = encrypt(content, KEY);
        System.out.println("加密后：" + encrypt);
 
        String decrypt = decrypt(encrypt, KEY);
        System.out.println("解密后：" + decrypt);*/
    	
    	String encrypt= encrypt("Rzxmaxc@123","act-telecom.com1","AES/ECB/PKCS5Padding");
        System.out.println("解密后：" + encrypt);
        
        String decrypt= decrypt("a/uxGrlyahfyOqSUTm7SOw==","act-telecom.com1","AES/ECB/PKCS5Padding");
        System.out.println("解密后：" + decrypt);
    }
}